10 Things You Need to Know as you start your Thursday

Soldiers of the U.S. Army 23rd chemical battalion wear gas masks while attending a demonstration of their equipment during a ceremony to recognize the battalion's official return to the 2nd Infantry Division based in South Korea at Camp Stanley in Uijeongbu, north of Seoul, on Thursday. The 23rd chemical battalion left South Korea in 2004 and returned with some 350 soldiers in Jan. 2013. The battalion will provide nuclear, biological and chemical detection, equipment decontamination and consequence management assistance to support U.S. and South Korean military forces. North Korea warned Thursday that its military has been cleared to attack the U.S. using "smaller, lighter and diversified" nuclear weapons, while the U.S. said it will strengthen regional protection by deploying a missile defense system to Guam. (AP Photo)

1. NUKE ATTACK THREATENED ON U.S. North Korea warned it will use "smaller, lighter and diversified" nuclear weapons, and the U.S. deployed an advanced missile defense system to Guam.

2. CONN. PASSES TOUGH GUN LAWS AFTER SCHOOL MASSACRE. The bill going to the governor today adds more than 100 firearms to the assault weapons ban and creates a registry for dangerous offenders.

3. 2 MORE SOUGHT IN PRISON CHIEF'S DEATH. Colorado authorities say the men belong to the same white supremacist gang as Evan Ebel, a suspect in the death of the corrections chief.

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4. WARNING SIGNS ABOUT EX-RUTGERS COACH. Mike Rice once knocked out of one of his father's teeth while playing basketball and a former assistant said he was "crazed" about the game.

5.OBAMA'S WALLET GETS THINNER. As a way to share the sacrifice of federal workers, he's going to return 5 percent of his presidential pay.

6. INFAMOUS CRUISE SHIP CORRALLED. The Carnival cruise liner that stranded thousands of passengers for days was torn from its moorings by strong winds.

7. WHAT VIETNAM VETS SEE IN SCIENTOLOGY. Soldiers exposed to Agent Orange are trying a 25-day vitamin and sauna regime promoted by the church.

8. THE MOST EXPENSIVE DISEASE. Alzheimer's costs up to $215 billion a year to manage, mostly on care to get the afflicted through daily routines.

9. THE PHONE FACEBOOK LIKES. The HTC smartphone being introduced today has new Android technology that deeply integrates the social network.

10. WHY NBC WENT FOR FALLON. The AP's David Bauder says 62-year-old Jay Leno has been around for a long time, while 38-year-old Fallon is up and coming. NBC also gets to move 'Tonight' back to New York.